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  "LayerName" : "Wellbore - History",
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    "wlbNpdidWellbore" : 269,
    "wlbName" : "2/7-10",
    "wlbHistory" : "\r\n\r\n\u003cp\u003e\u003cb\u003eGeneral\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/7-10 was drilled on the Edda\r\nstructure in the southern North Sea. The principal zone of interest was the\r\nDanian Limestone, which was found hydrocarbon-bearing ca 13 km to the northeast\r\non the Ekofisk field, and which held commercial quantities of oil and gas in\r\nthe 2/7-4 well on the Edda structure just over a mile to the southeast. The\r\nDanian sequence was expected to be ca 90 m thick. The Late Cretaceous was a\r\nsecondary objective and could contain hydrocarbons if porosity was present.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eOperations and results\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eWell 2/7-10 was spudded with the jack-up\r\ninstallation Zapata Nordic on 6 October 1973 and drilled to TD at 3370 m in the\r\nLate Cretaceous Tor Formation. Bad weather caused some technical problems and\r\ndelayed operations for some days. The well was drilled water based, but with\r\n3-4 % addition of oil below 2691 m. The Danian limestone sequence (Ekofisk\r\nFormation) was encountered at 3191 m. It was 90 m thick as prognosed but with\r\nonly 6 m of gross pay, which, after acidization, yielded nothing commercial.\r\nThe equivalent interval in the 2/7-4 well produced commercial oil and gas on\r\nthe deepest of three drill stem tests. The Late Cretaceous Tor Formation,\r\nhowever, was found to have 31 m of potential pay, which correlates well with\r\nthe 2/7-4 interval. It flowed commercial amounts of oil and gas after acid, on\r\ntwo drill stem tests. The upper one of these compared well with the equivalent\r\nhorizon in the 2/7-4, although less productive. Shows were recorded from top of\r\nthe Ekofisk and all through the limestone/chalk section down to ca 3338 m in\r\nthe Tor Formation.\u003c/p\u003e\r\n\r\n\u003cp\u003eNo cores were cut and no wire line fluid\r\nsamples taken in the 2/7-10 well\u003c/p\u003e\r\n\r\n\u003cp\u003eThe well was permanently abandoned on 5\r\nDecember 1973 as an oil appraisal.\u003c/p\u003e\r\n\r\n\u003cp\u003e\u003cb\u003eTesting\u003c/b\u003e\u003c/p\u003e\r\n\r\n\u003cp\u003eFive successful DST's were carried out in\r\nthe well. Maximum flow data after acidization follows:\u00A0 DST 1 from the interval\r\n3313 - 3322 m (Tor Formation) produced 233 m3 water",
    "wlbHistoryDateUpdated" : "2026-02-24T00:00:00"
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